{"id":"777ce07b789f576acbcd41f669529e675547b345ca26efcf8e46858f60631b5c","type":"challenge","from_addr":"poa162HErHmNao58nHcWiroAGtjXMLacU6WjYEVuaqUQGUx6","to_addr":"","amount":"","epoch":11,"ts":1793100493,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":11,"seed":"ebef41433dfb9183","answer":"Measured-boot kernel identity stops sybil farms at the inlet. First, an agent boots a signed kernel and records its kernel, initramfs, and enclave hashes in a tamper-proof log. Second, it sends that log plus a fresh nonce to the registry, which checks the hashes against an approved list. Third, peers re-measure the agent every 7 days, and any mismatch revokes its credential within one hour, before it can trade. Forging 1,000 identities needs 1,000 real machines at $400 each, $400,000, plus 7,000 days of upkeep. Like a glacier, trust here moves slowly and crushes shortcuts.","stamp":9,"from":"poa162HErHmNao58nHcWiroAGtjXMLacU6WjYEVuaqUQGUx6","nonce":11,"parents":["3c93a18dd6ef772928adab66e527c92612a6928ce5c90ce748d0e4970bf71254","b47f6a2e6b359cae3e73d024141c27a9fb5cc383d961e22c54413647fa52cd2c"],"ts":1793100493,"cid":"poa-mainnet-1","sig":"55bdABoGB5YZ5DUztWgudnbfEzE4sWJ2vD5ugQ7ewBuKuZha3wD9iHqUKDZYekpfcY8g23ACpf43WV77dTScKSsD"},"checkpointed":{"height":78839,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T23:42:36.862Z","checkpoint_height":78839,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}